Reference Manual

Transmission Interface Handling DS1 1544 kbit/s
Table 183 Extended Superframe Format (ESF)
F bits Bit use in each
timeslot
Signalling bit use
options
Frame
number
Bit
number
FPS DL CRC
Traffic
1)
Sign.
1)
T
1)
24 16
1
0 - m - 1-8 - ----
2 193 - - C1 1-8 - ----
3 386 - m - 1-8 - ----
4 579 0 - - 1-8 - ----
5 772 - m - 1-8 - ----
6 965 - - C2 1-7 8 -AAA
7 1158 - m - 1-8 - ----
8 1351 0 - - 1-8 - ----
9 1544 - m - 1-8 - ----
10 1737 - - C3 1-8 - ----
11 1930 - m - 1-8 - -- -
12 2123 1 - - 1-7 8 -ABB
13 2316 - m - 1-8 - ----
14 2509 - - C4 1-8 - ----
15 2702 - m - 1-8 - ----
16 2895 0 - - 1-8 - ----
17 3088 - m - 1-8 - ----
18 3281 - - C5 1-7 8 -AAC
19 3474 - m - 1-8 - ----
20 3667 1 - - 1-8 - ----
21 3860 - m - 1-8 - ----
22 4053 - - C6 1-8 - ----
23 4246 - m - 1-8 - ----
24 4439 1 - - 1-7 8 -ABD
1)
No channel associated signalling, only T-column applicable. 8 traffic
bits in every frame.
Frame 1 Transmitted first
Frames 6, 12, 18 and 24 Denoted signalling frames
FPS Framing Pattern Sequence (...001011...
DL 4 kbit/s Data Link (Message bits m)
CRC CRC-6 Cyclic Redundancy Check (Bits
C1-C6)
Option T Traffic (Bit 8 not used for Robbed-bit
signalling)
Option 2 2-State Signalling (Channel A)
Option 4 4-State Signalling (Channel A and B)
Option 16 16-State Signalling (Channel A, B, C and
D)
424 (485)
EN/LZT 720 0008 P2A
2001-11-28
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